Die for making turn-buckles



(No Model.) 3 SheetsSheet l. G. H. WILLIAMS.

DIE FOR MAKING TURN BUCKLES.

No. 332,127. Patented Dec. 8, 1885.

ATTORNEY (No Model.)

v 3 Sheets-Sheet 2. O. H. WILLIAMS.

DIE FOR. MAKING TURN BUCKLES.

Patented Dec. 8, 1885. 227.7.

LLLWQ IIVVE/VTOR I BY ATTORNEY u PETERS. Phnlo-Lii nn n nnnnnnnnnnnnnnn c.

(No Model.) 3 SheetsSheet 3. G. H. WILLIAMS.

DIE FOR MAKING TURN BUOKLBS.

No. 332,127. Patented Dec. 8, 1885.

ATTORNEY joints thereof are closed.

UNITED STATES PATENT OFFICE.

CHARLES H. WVILLIAMS,

OF CLEVELAND, OHIO.

DIE FOR MAKING TURN-BUCKLES.

SPECIFICATION forming part of Letters Patent No. 332,127, dated December 8, 1885.

Application filed July 31, 1885. Serial No. 173,173.

To all whom, it may concern.-

Be it known that I, CHARLES H. WILLIAMS, a citizen of the United States, residing 'at Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain new and useful Improvements in Dies for Making Turn-' Buckles, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to dies for forming turn-buckles; and it has for one of its objects the production of a turn-buckle which shall be entirely free from longitudinal fins. Such fins have heretofore been produced by reason of the employment of holding and other dies divided longitudinally into sections. Another object in view is to provide a mechanism that shall form a positively rigid support or anvil to resist the pressure of the header or plunger upon the stock, instead of putting this holding function upon dies formed in sections, adapted to be separated, requiring forcible lateral pressure, and affording a limited end surface of contact with the stock to resist the pressure of the header or plunger. Another object is to provide devices which in connection with a fixed inner die or anvil will prevent lateral spreading of the sides of .the turnbuckle blank at the time the head portion or portions are swaged to final shape by the header or plunger. Another object in view is to positively and accurately centralize the bore of the head of the turn-buckle relative to its sides, and to determine the size of its bore so that it may be by simply reaming out the scale fitted for cutting the thread therein. A further object is to provide a header and mandrel of such a construction and having such a mode of operation in use that the head of the turn-buckle is formed by compressing the stock inwardly upon the mandrel, in contradistinction to spreading it outwardly by means of a spreader or punch.

Other objects and advantages of my invention will appear in the following description, and the novel features thereof will be particularly pointed out in the claims.

Referring to the drawings, Figure 1 is a perspective of a buckle-blank before the lap- Fig. 2 is an end elevation of the lap-joints; and Fig. 3, a similar View of the same with the lap-joints more (No model.)

nearly closed, such being their position when the blank is placed in the dies for completion, as hereinafter described. Fig. 4 is a vertical section on the line X of Fig. 6; Fig. 5, an end elevation, and Fig. 6 a side elevation, of the completed turn-buckle. Fig. 7 is a plan, and Fig. 8 a front elevation, of dies constructed in accordance with my invention. Fig. 9 is a diagram illustrating relative proportions of the turn-buckle when completed. Fig. 10 is a central vertical section on the line Yof Fig. 8, showing the dies and blank in the positions they assume when forming the head of the turn-buckle. Fig. 11 is a horizontal section through the axis of the mandrel and header, and embodying modifications hereinafter de scribed. Fig. 12 is a plan of the modification illustrated in Fig. 11, the mandrel and head of the turn-buckle being shown in dotted lines.

Like letters indicate like parts in all the figures of the drawings.

Referring to Figs. 7 to 12, A represents a bed-plate provided with a groove, A, for the reception of an inner fixed die or anvil,,B, which may be formed integral with the bed, or may be removably retained within said groove by means of a strap (and bolts A secured to the bed. The anvil or inner die, B, has a contour conforming to that of all of the inner surfaces of the turnbuckle which come in contact therewith, and at such points as are above the turn-buckle when being formed on the anvil the latter is more or less sharply tapered, to permit a blank to be easily placed upon and removed therefrom. The end of the anvil presents a broad, solid, fixed surface, against which the head portion of the blank rests and is interiorly formed. By slightly rounding the corners of the anvil, as at B, Fig. 7, a proper fillet is provided at the junction of the sides and head of the turn-buckle.

B represents an aperture in the end of the anvil for the reception of the end of the mandrel O, the extreme end 0 of which is sharply tapered to permit its easy entrance into and withdrawal from the anvil.

D represents the header, in which the mandrel O is mounted, or of which the mandrel C may be formed as a part. In this instance the header is bored for the reception of the mandrel, and the latter is screw-threaded into the former, as at 0 its end 0 being formed to provide a wrench-surface for firmly inserting the mandrel into the head. The forward end of the head is provided with a cavity the walls of which are completely circular and inclined, as shown at D, so as to conform to the outline of the head of the turn-buckle. The characteristics of the concavity of the header are that it is substantially cone-shaped. with the larger portion of the cone disposed at the end of the header, and so that no insets or recesses occur, which would impede-the withdrawal of the header from the stock after operating thereon. WVithin the cavity of the header the mandrel C is slightly tapered, simplyand for the sole purpose of permitting its easy removal from a head when once formed, and so that the sudden cooling of the metal of the head shall not contract the same firmly upon the mandrel. The mandrel C is in no sense a punch or spreader, nor is it intended to operate as such, as the stock supplied for the head is, by reason of the tapering walls D of the header or plunger, closed inwardly around, against, and upon the mandrel. In fact, the blank is provided with a bore larger in diameter than that of the mandrel, so that the latter, instead of acting as a spreader, serves to determine exactly the diameter of the bore of the head, by resisting the inward movement of the stock, produce by the concavity of the header.

One of the principal objects and novel features of my invention is that I employa header and mandrel so constructed and co-operating that the metal which forms the head is forced inwardly, instead of being spread outwardly, the former process affecting favorably the perfection of the welds, seams, or lap-joints ofthe sides and the head, as it tends to force them together, while the latter processthat is, the employment of the spreader or punch has a marked tendency to force them apart or separate them.

It is not absolutely necessary that the forward end of the mandrel should enter the aperture in the die B, as said mandrel may terminate at the end of the die or anvil B, as shown by dotted lines Z, Fig. 10, in which case the aperture B would be omitted, and the broad unbroken end surface of the die would beleft intact. So, also, the mandrel may in that case be brought simply in contact with the die, or, if desired, it may not come actually in contact therewith, but may permit a slight parting in the metal to be formed at that point, though the stock will not be forced between the end of the mandrel and the die to any material extent.

E, Figs. 7 and 8, represents side retainingdies, which are mou med in ways E on the lied-plate, to be moved laterally toward and from the anvil B, the left die in Fig. 7 being shownremoved and the right die in contact with the side of the anvil. The s le function and purpose of these side dies are to prevent outward lateral expansion of the sides of the turn-buckle at the time the head is formed thereon, and they perform no function of holding the blank against longitudinal movement away from the header when operating to form the head of the turn-buckle. The inner edges of the dies E are concaved, as at'E Fig. 8, to conform to the outline of the sides of the turn-buckle, and to permit an escape for any surplus of stock in thehead, to be forced into the sides, thus slightly enlongating them.

Instead of the side retaining-dies, E,-I may form retaining devices or extensions D upon or as a part of the header'l), in which case the forward ends of said extensions arefiared outwardly. as at D to prevent abrading the sides of the turn-buckle, and in this instance also the upper and lower edges, D, of said extensions are preferably, though not necessarily, constructedto come in contact with the sides of the fixed die or anvil B to serve in a measure as a guide to the header. It will readily be seen that said extensions will prevent lateral expansion of the sides of the turn-buckle at the time that the header is operating upon the head thereof.

I consider the circular contour of the concavity in the header or plunger and its continuously slanted, beveled, or cone-shaped inf terior an important novel feature of my invention, and as possessing great advantages in construction and in use.

In construction the header may be cast comparativelylarge and bulky, and by the use of a reamer of the proper size and outline of the head of a turn-buckle of a desired size such cast header may be readily fitted up for use, and when worn by use another reamer of the next larger size may be used to fit said worn head for further usein making buckles of such larger size, whereby the cost of dies is reduced one-half,-whereas oval and other dies require the slow and expensive process of hand-labor to construct them, and when worn are thrown aside as worthless. Again, by reason of the cylindrical interior of the concavity of the head all the enlargements of the head of the turn-buckle are in front in the direction of the movement of the header, so that no lateral parting of the header or of the dies is necessary to remove the same from the work or the work therefrom. In like manner the mandrels O.when worn or damaged by fire-cracks caused by the heated metal pressed thereon, may cheaply be reduced from size to size until all practical worth of the same has been utilized. So, also, may the fixed dies or anvils B be work over into smaller sizes,and the mandrelaperture thereof, when used, may be hushed or capped to receive such smaller mandr'elsso that all the parts employed which are liable to become worn permit a ready refitting of the same for further use, and great economy is secured.

It is apparent that inner fixed diesor anvils of various sizes may be mounted upon the bed-plate to adapt my invention for use in producing turn-buckles of different sizes.

A thus far described,it will be noticed that the principal elements of my invention are, a fixed inner die or anvil, side retaining devices, a header, and a mandrel, these being constructed to operate as hereinafter more particularly described. a

In this instance I produce a turn-buckle in which the sides F are oval, and their exterior contour is such as to conform to the completely circular outline of the heads G, while the bores G of each of the heads is proportionate to the amount of stock disposed in the sides.

The circle 11 in Fig. 9 represents the bore of the head, while the full lines represent the stcck in the sides. By this diagram it will be seen that there is a surplus of stock in the sides over and above that whichis in a boltor rod of a size suited to the turn-buckle,so that sufficient strength is provided in the turnbuckle to prevent weakness thereof when used with any rod or bolt adapted to it.

I wish it understood that I do not limit my invention to the exact proportions of the several parts of the turn-buckle produced, nor to the exact proportions of the dies and their concavities for producing the same.

By reference to Figs. 1 to 6, inclusive, it will be seen that the blank comprises two sides, F F, and heads G G, having the lapjoints F, whereby the two parts are united. Such lap-joints are, by any suitable means, brought to a nearly closed position, as shown in Fig. 3, when one or both ends of a blank are brought to the welding-heat and the blank is placed upon the fixed anvil B. The side dies, E, if used, are brought against the die B, so as to retain the sides F from lateral ex pansion, or this function may be performed by the extensions D on the head D. After the blank is placed upon the anvil B the header, with its mandrel, is brought toward the anvil, the point of the mandrel entering the aperture B thereof, if such aperture be employed, and the extensions D being in advance of the concavity of the header, first arrive at their operative position to prevent lateral outward expansion of the sides F, and the concavity in the header begins to compress the metal inwardly upon the mandrel 0. As soon a as the header has reached the end of its stroke,

it is quickly withdrawn and the blank removed, and another blank submitted for the same operation.

It is apparent that two headers may operate simultaneously upon a single blank, the inner die being of proper length for each size of the blanks made.

I have not shown any mechanism for giving the proper motion to the movable parts employed, as this is a matter within the skill of persons conversant with the construction of metal-working machinery.

Having described my invention and its operation, what I claim is 1. In a machine for forming turn-buckles, an integral inner die or anvil conforming to the interior of the head portion of a turnbuckle, substantially as specified.

2. In a machine for forming turn-buckles, an integral inner die or anvil and a header operating longitudinally against the turn buckle blank mounted on said anvil, substantially as specified.

3. The combination of a fixed inner die or anvil, a header, and side-retaining devices, substantially as specified.

4. A header provided with side-retaining extensions conforming to the sides of a turnbuckle, substantially as specified.

5. An integral inner die or anvil and a header, in combination with side-retaining devices adapted to bear against said inner die or anvil, substantially as specified. V

6. The combination of a fixed integral inner die or anvil, a movable header operating to force metal inwardly, and a mandrel operating to limit the inward movement of the metal, substantially as specified.

7. A fixed undivided inner die or anvil conforming to the interior outline of a turnbuckle, in combination with an undivided heading-die having a concavity circular in all of its crosssections, and having a mandrel whereby longitudinal fins on the sides and head of a turnbuckle, either interiorly or ex teriorly located, are obviated, substantially as specified.

8. An integral undivided heading-die having a concavity circular in all of its cross sections, and a concentric mandrel,whereby the formation of insets, recesses, and fins by said die upon the head of a turn-buckle is prevented, substantially as specified.

9. The combination of the die D, having the concavity D, circular in all of its crosssections, the mandrel G, and extensions D with the fixed die B, having the aperture B substantially as specified.

10. The combination of the bed-plate A, having the groove A, the removably-fixed inner die, B, having the aperture B, and the head D, having the mandrel O, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.v

CHARLES H. WILLIAMS. Witnesses:

E. B. STOCKING, WM. S. DUVALL.

ICC

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